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https://issues.apache.org/jira/browse/HBASE-20280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16416371#comment-16416371
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Andrew Purtell commented on HBASE-20280:
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The prefetch changes to HFileReaderImpl are from 4 years ago and I don't
remember them now, sorry. Analysis of the problem and change lgtm, though. +1
> Fix possibility of deadlocking in refreshFileConnections when prefetch is
> enabled
> ---------------------------------------------------------------------------------
>
> Key: HBASE-20280
> URL: https://issues.apache.org/jira/browse/HBASE-20280
> Project: HBase
> Issue Type: Bug
> Components: BucketCache
> Affects Versions: 2.0.0-beta-2, 1.4.2
> Reporter: Zach York
> Assignee: Zach York
> Priority: Major
> Attachments: HBASE-20280.master.001.patch
>
>
> When prefetch on open is specified, there is a deadlocking case
> where if the prefetch is cancelled, the PrefetchExecutor interrupts
> the threads if necessary, when that happens in FileIOEngine, it
> causes an ClosedByInterruptException which is a subclass of
> ClosedChannelException. If we retry all ClosedChannelExceptions,
> this will lock as this access is expected to be interrupted.
> This change removes calling refreshFileConnections for
> ClosedByInterruptExceptions.
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